﻿/* 程序名：ROI.cpp
功能：从磁盘中读入图像文件，并进行感兴趣区域处理
作者：胡斌
日期：2010-8-10
*/

#include "highgui.h"
#include "cv.h"
#include <iostream.h>

void main()
{
	IplImage *src = cvLoadImage("lena.jpg",-1);	//读入图像
	IplImage *dst;
	CvRect ROI_rect_src;
	CvRect ROI_rect_dst;
	cvNamedWindow("src",CV_WINDOW_AUTOSIZE);
	cvMoveWindow("src",200,200);
	cvShowImage("src",src);						//输出未定位ROI的图像
	cvWaitKey(0);

	ROI_rect_src.x=src->width/2;
	ROI_rect_src.y=src->height/2;
	ROI_rect_src.width=200;
	ROI_rect_src.height=200;
	cvSetImageROI(src,ROI_rect_src);
	cout<<"输出图像区域"<<endl;
	cout<<(src->roi->xOffset)<<""<<(src->roi->yOffset)<<endl;
	cout<<(src->roi->width)<<""<<(src->roi->height)<<endl;
	cvShowImage("src",src);						//输出设定ROI以后的图像

	dst=cvCloneImage(src);						//复制出ROI区域的图像
	ROI_rect_dst=cvGetImageROI(dst);			//得到图像的ROI区域
	cout<<"输出目标图像的ROI"<<endl;
	cout<<ROI_rect_dst.x<<" "<<ROI_rect_dst.y<<endl;
	cout<<ROI_rect_dst.width<<" "<<ROI_rect_dst.height<<endl;
	cvNamedWindow("dst",CV_WINDOW_AUTOSIZE);
	cvMoveWindow("dst",400,200);
	cvShowImage("dst",dst);
	cvWaitKey(0);

	cvResetImageROI(dst);						//释放目标图像的ROI
	cvShowImage("dst",dst);
	cvWaitKey(0);
	cvReleaseImage(&src);
	cvReleaseImage(&dst);
}